whitespace in validation

[eluser]Flemming[/eluser]
I found that the solution described above and in the wiki for validating alpha numeric with spaces gave me the following error:

Code:

preg_match() [function.preg-match]: Compilation failed: range out of order in character class at offset...

so i changed the regex to the following:

Code:

return ( ! preg_match("/^([-a-z0-9_-\s])+$/i", $str)) ? FALSE : TRUE;

using a '\s' instead of an empty space

and that cured it.